If the Symantec Endpoint Protection Manager (SEPM) does not have internet connectivity, the scm-server-0.log and scm-server-1.log files will show repeated errors regarding a communication failure to securityresponse.symantec.com. This is expected, if the SEPM does not have internet access.
SEPM does not have internet connectivity and is generating failure messages every 10 minutes due to the ThreatCon lookup failing.
com.sygate.scm.common.communicate.CommunicationException: Failed to connect to securityresponse.symantec.com. Make sure the server can ping or resolve this domain. ErrorCode: 0x10020000